Effect of aging time on the physicochemical properties of lime used to preserve corn postharvest

IF 2.7 2区农林科学 Q1 ENTOMOLOGY

Journal of Stored Products Research Pub Date : 2024-11-06 DOI:10.1016/j.jspr.2024.102462

Efren Herrera-López , Sylvanus Odjo , Luis F. Zubieta-Otero , Brenda L. Contreras-Jiménez , Fabiola Curiel-Ayala , Lina Garcia-Mier , Mario E. Rodriguez-Garcia

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引用次数: 0

Abstract

This study investigates the effectiveness of two types of lime (Ca(OH)₂) micronized and normal lime in the conservation of corn in Texcoco and Chiapas, Mexico, taking into account the influence of regional relative humidity on the carbonation of calcium hydroxide as a postharvest treatment. The analysis includes X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) over six months. After three months, samples were taken to assess complete carbonation and to determine the optimal mean lifetime of calcium hydroxide as a preservative against bacterial or pest infestation. Focusing on converting calcium hydroxide to calcium carbonate, the study maintains the relative humidity at 14–16% for Chiapas and 6–7% for Texcoco. The XRD study shows carbonation begins within 15 days and progresses to complete conversion to CaCO₃ after 90 days, rendering the sample inert. Infrared spectrophotometry confirms the presence of calcium carbonates, calcium oxide, and calcium hydroxide in both regions. SEM examination confirms the conversion of Ca(OH)₂ to CaCO₃ within 90 days. The collective results confirm the feasibility of lime as a postharvest preservation method for corn, with a comprehensive understanding of the temporal aspects of converting calcium hydroxide to calcium carbonate under different regional moisture conditions.

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陈化时间对用于收获后保存玉米的石灰的理化特性的影响

本研究调查了两种石灰（Ca(OH)2）微粉化石灰和普通石灰在墨西哥特斯科科和恰帕斯玉米保护中的有效性，同时考虑了地区相对湿度对氢氧化钙碳化作为收获后处理的影响。分析包括六个月的 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FT-IR) 和扫描电子显微镜 (SEM)。三个月后，取样评估完全碳化情况，并确定氢氧化钙作为防腐剂防止细菌或害虫侵袭的最佳平均寿命。研究的重点是将氢氧化钙转化为碳酸钙，恰帕斯州的相对湿度保持在 14-16%，特斯科科州的相对湿度保持在 6-7%。XRD 研究表明，碳化过程在 15 天内开始，90 天后完全转化为 CaCO3，使样品成为惰性。红外分光光度法证实，两个地区都存在碳酸钙、氧化钙和氢氧化钙。扫描电镜检查证实 Ca(OH)2 在 90 天内转化为 CaCO3。这些综合结果证实了石灰作为玉米收获后保存方法的可行性，并全面了解了氢氧化钙在不同地区水分条件下转化为碳酸钙的时间方面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Stored Products Research 生物-昆虫学

CiteScore

5.70

自引率

18.50%

发文量

112

审稿时长

45 days

期刊介绍： The Journal of Stored Products Research provides an international medium for the publication of both reviews and original results from laboratory and field studies on the preservation and safety of stored products, notably food stocks, covering storage-related problems from the producer through the supply chain to the consumer. Stored products are characterised by having relatively low moisture content and include raw and semi-processed foods, animal feedstuffs, and a range of other durable items, including materials such as clothing or museum artefacts.